{"id":"CVE-2026-58051","aliases":["ALPINE-CVE-2026-58051","AZL-91385","AZL-97395","AZL-97437","BELL-CVE-2026-58051","DEBIAN-CVE-2026-58051","EUVD-2026-39971","GHSA-c5f3-hwj2-xp5p","JLSEC-2026-663","MGASA-2026-0273","RHSA-2026:46535","RHSA-2026:46927","ROOT-OS-ALPINE-322-CVE-2026-58051","ROOT-OS-ALPINE-323-CVE-2026-58051","ROOT-OS-DEBIAN-12-CVE-2026-58051","ROOT-OS-DEBIAN-13-CVE-2026-58051","SUSE-SU-2026:23049-1","SUSE-SU-2026:23187-1","SUSE-SU-2026:23214-1","SUSE-SU-2026:23225-1","SUSE-SU-2026:23245-1","SUSE-SU-2026:3525-1","SUSE-SU-2026:3526-1","SUSE-SU-2026:3541-1","SUSE-SU-2026:4095-1","UBUNTU-CVE-2026-58051","USN-8532-1","USN-8799-1","openSUSE-SU-2026:11454-1","openSUSE-SU-2026:21549-1"],"status":"published","title":"libssh2 - Free of Uninitialized Pointer in publickey List Cleanup","description":"libssh2 through 1.11.1 grows its publickey list with SSH2_REALLOC but does not zero-initialize new entries before parsing populates them, so a parse failure reaching the cleanup path leaves libssh2_publickey_list_free operating on an uninitialized entry. A malicious SSH server offering the publickey subsystem can use a malformed response to make cleanup free an uninitialized, attacker-influenceable attrs pointer in a connecting libssh2 client.","severity":{"version":"4.0","score":8.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00286,"percentile":0.21367,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-908"],"published":"2026-06-28T01:32:54Z","modified":"2026-11-11T02:49:02Z","fixes":[{"ecosystem":"Alpine:v3.21","package":"libssh2","fixed_in":["1.11.1-r3"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"libssh2","fixed_in":["1.11.1-r3"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"libssh2","fixed_in":["1.11.1-r4"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"libssh2","fixed_in":["1.11.1-r4"],"sources":["osv"]},{"ecosystem":"Azure Linux:3","package":"libssh2","fixed_in":["1.11.1-6"],"sources":["osv"]},{"ecosystem":"Azure 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A malicious SSH server offering the publickey subsystem can use a malformed response to make cleanup free an uninitialized, attacker-influenceable attrs pointer in a connecting libssh2 client.","status":"published","published":"2026-06-28T01:32:54.283Z","modified":"2026-11-10T12:48:59.666Z","cvss":[{"version":"4.0","score":8.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-908"],"updated_at":"2026-11-10T13:38:45.30478Z"}],"euvd":[{"id":"EUVD-2026-39971","description":"libssh2 through 1.11.1 grows its publickey list with SSH2_REALLOC but does not zero-initialize new entries before parsing populates them, so a parse failure reaching the cleanup path leaves libssh2_publickey_list_free operating on an uninitialized entry. 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A malicious SSH server offering the publickey subsystem can use a malformed response to make cleanup free an uninitialized, attacker-influenceable attrs pointer in a connecting libssh2 client.","status":"published","published":"2026-06-28T03:33:40Z","modified":"2026-11-10T15:33:54Z","cvss":[{"version":"4.0","score":8.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"medium"}],"cwes":["CWE-908"],"updated_at":"2026-11-10T15:55:02.881893Z"}],"nvd":[{"id":"CVE-2026-58051","description":"libssh2 through 1.11.1 grows its publickey list with SSH2_REALLOC but does not zero-initialize new entries before parsing populates them, so a parse failure reaching the cleanup path leaves libssh2_publickey_list_free operating on an uninitialized entry. A malicious SSH server offering the publickey subsystem can use a malformed response to make cleanup free an uninitialized, attacker-influenceable attrs pointer in a connecting libssh2 client.","status":"published","published":"2026-06-28T02:16:32.153Z","modified":"2026-11-10T13:19:28.993Z","cvss":[{"version":"4.0","score":8.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-908"],"updated_at":"2026-11-10T16:19:47.381868Z"}],"osv":[{"id":"ALPINE-CVE-2026-58051","description":"libssh2 through 1.11.1 grows its publickey list with SSH2_REALLOC but does not zero-initialize new entries before parsing populates them, so a parse failure reaching the cleanup path leaves libssh2_publickey_list_free operating on an uninitialized entry. A malicious SSH server offering the publickey subsystem can use a malformed response to make cleanup free an uninitialized, attacker-influenceable attrs pointer in a connecting libssh2 client.","status":"published","published":"2026-06-28T02:16:32.153Z","modified":"2026-10-21T08:30:02.631941036Z","cvss":[{"version":"4.0","score":8.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"}],"updated_at":"2026-11-02T15:27:50.764331Z"},{"id":"BELL-CVE-2026-58051","status":"published","published":"2026-07-01T06:03:04.763832Z","modified":"2026-09-09T07:15:07.475004244Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"medium"}],"updated_at":"2026-11-02T15:28:24.657778Z"},{"id":"CVE-2026-58051","title":"libssh2 - Free of Uninitialized Pointer in publickey List Cleanup","description":"libssh2 through 1.11.1 grows its publickey list with SSH2_REALLOC but does not zero-initialize new entries before parsing populates them, so a parse failure reaching the cleanup path leaves libssh2_publickey_list_free operating on an uninitialized entry. A malicious SSH server offering the publickey subsystem can use a malformed response to make cleanup free an uninitialized, attacker-influenceable attrs pointer in a connecting libssh2 client.","status":"published","published":"2026-06-28T01:32:54.283Z","modified":"2026-11-11T02:49:02.996245939Z","cvss":[{"version":"4.0","score":8.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-908"],"updated_at":"2026-11-11T03:21:28.618498Z"},{"id":"DEBIAN-CVE-2026-58051","description":"libssh2 through 1.11.1 grows its publickey list with SSH2_REALLOC but does not zero-initialize new entries before parsing populates them, so a parse failure reaching the cleanup path leaves libssh2_publickey_list_free operating on an uninitialized entry. A malicious SSH server offering the publickey subsystem can use a malformed response to make cleanup free an uninitialized, attacker-influenceable attrs pointer in a connecting libssh2 client.","status":"published","published":"2026-06-28T02:16:32.153Z","modified":"2026-11-11T09:47:43.969431558Z","cvss":[{"version":"4.0","score":8.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"}],"updated_at":"2026-11-11T10:35:40.696585Z"},{"id":"JLSEC-2026-663","title":"libssh2 through 1.11.1 grows its publickey list with `SSH2_REALLOC` but does not zero-initialize new...","description":"libssh2 through 1.11.1 grows its publickey list with `SSH2_REALLOC` but does not zero-initialize new entries before parsing populates them, so a parse failure reaching the cleanup path leaves `libssh2_publickey_list_free` operating on an uninitialized entry. A malicious SSH server offering the publickey subsystem can use a malformed response to make cleanup free an uninitialized, attacker-influenceable attrs pointer in a connecting libssh2 client.","status":"published","published":"2026-07-11T04:13:36.542Z","modified":"2026-07-25T18:23:59.098947883Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"medium"},{"version":"4.0","score":8.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"}],"updated_at":"2026-11-02T15:47:19.003546Z"},{"id":"RHSA-2026:46535","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update","status":"published","published":"2026-07-28T10:13:53Z","modified":"2026-10-06T10:31:35.521828621Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:53:20.984762Z"},{"id":"RHSA-2026:46927","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update","status":"published","published":"2026-07-28T10:13:55Z","modified":"2026-10-06T10:31:26.639042868Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:53:20.984762Z"},{"id":"UBUNTU-CVE-2026-58051","description":"libssh2 through 1.11.1 grows its publickey list with SSH2_REALLOC but does not zero-initialize new entries before parsing populates them, so a parse failure reaching the cleanup path leaves libssh2_publickey_list_free operating on an uninitialized entry. A malicious SSH server offering the publickey subsystem can use a malformed response to make cleanup free an uninitialized, attacker-influenceable attrs pointer in a connecting libssh2 client.","status":"published","published":"2026-06-28T02:16:00Z","modified":"2026-09-23T07:41:35.783296482Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H","level":"medium"},{"version":"4.0","score":8.3,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T16:56:41.911783Z"},{"id":"AZL-91385","title":"CVE-2026-58051 affecting package libssh2 for versions less than 1.11.1-6","description":"libssh2 through 1.11.1 grows its publickey list with SSH2_REALLOC but does not zero-initialize new entries before parsing populates them, so a parse failure reaching the cleanup path leaves libssh2_publickey_list_free operating on an uninitialized entry. A malicious SSH server offering the publickey subsystem can use a malformed response to make cleanup free an uninitialized, attacker-influenceable attrs pointer in a connecting libssh2 client.","status":"published","published":"2026-06-28T02:16:32Z","modified":"2026-11-05T05:40:51Z","updated_at":"2026-11-05T16:41:25.633663Z"},{"id":"AZL-97395","title":"CVE-2026-58051 affecting package rust for versions less than 1.75.0-30","description":"libssh2 through 1.11.1 grows its publickey list with SSH2_REALLOC but does not zero-initialize new entries before parsing populates them, so a parse failure reaching the cleanup path leaves libssh2_publickey_list_free operating on an uninitialized entry. A malicious SSH server offering the publickey subsystem can use a malformed response to make cleanup free an uninitialized, attacker-influenceable attrs pointer in a connecting libssh2 client.","status":"published","published":"2026-06-28T02:16:32Z","modified":"2026-11-05T05:40:51Z","updated_at":"2026-11-05T16:41:26.280152Z"},{"id":"AZL-97437","title":"CVE-2026-58051 affecting package rust for versions less than 1.96.0-1","description":"libssh2 through 1.11.1 grows its publickey list with SSH2_REALLOC but does not zero-initialize new entries before parsing populates them, so a parse failure reaching the cleanup path leaves libssh2_publickey_list_free operating on an uninitialized entry. A malicious SSH server offering the publickey subsystem can use a malformed response to make cleanup free an uninitialized, attacker-influenceable attrs pointer in a connecting libssh2 client.","status":"published","published":"2026-06-28T02:16:32Z","modified":"2026-11-05T05:40:51Z","updated_at":"2026-11-05T16:41:26.280152Z"},{"id":"MGASA-2026-0273","title":"Updated libssh2 packages fix security vulnerabilities","description":"The updated packages fix security vulnerabilities:\nHeap Buffer Over-read via sftp_symlink() in sftp.c. (CVE-2025-15661)\nlibssh2 userauth.c userauth_password integer overflow. (CVE-2026-7598)\nPre-Authentication DoS via SSH_MSG_EXT_INFO Handler. (CVE-2026-55199)\nOut-of-Bounds Write via Unchecked packet_length in transport.c.\n(CVE-2026-55200)\nInteger Overflow in publickey Subsystem Attribute Allocation.\n(CVE-2026-58050)\nFree of Uninitialized Pointer in publickey List Cleanup.\n(CVE-2026-58051)\n","status":"published","published":"2026-07-20T19:06:32Z","modified":"2026-07-20T19:20:56.035464062Z","updated_at":"2026-11-02T15:49:43.795591Z"},{"id":"openSUSE-SU-2026:11454-1","title":"libssh2-1-1.11.1-4.1 on GA media","description":"These are all security issues fixed in the libssh2-1-1.11.1-4.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-08-05T00:00:00Z","modified":"2026-08-06T11:15:08.072115692Z","updated_at":"2026-11-02T16:58:39.516824Z"},{"id":"openSUSE-SU-2026:21549-1","title":"Security update for libssh2_org","description":"This update for libssh2_org fixes the following issues:\n\n- CVE-2025-15661: out-of-bounds heap read vulnerability in the `sftp_symlink()` function in `src/sftp.c` (bsc#1268546).\n- CVE-2026-7598: integer overflow in function `userauth_password` of file `src/userauth.c` (bsc#1263890).\n- CVE-2026-58050: heap buffer overflow due to missing bounds check in attribute count of publickey-subsystem response\n  (bsc#1269568).\n- CVE-2026-58051: uninitialized pointer freed when malformed responses are sent by an SSH server (bsc#1269567).\n- CVE-2026-66032: arbitrary code execution via double-free in SFTP session (bsc#1272737).\n- CVE-2026-66033: denial of service via integer underflow in AES-GCM cipher negotiation (bsc#1272736).\n- CVE-2026-66034: information disclosure and potential arbitrary code execution via heap out-of-bounds read\n  (bsc#1272735).\n- CVE-2026-66035: arbitrary code execution via heap buffer overflow during SSH negotiation (bsc#1272734).\n","status":"published","published":"2026-08-10T15:24:32Z","modified":"2026-08-12T18:23:41.472675266Z","updated_at":"2026-11-02T16:58:41.885092Z"},{"id":"ROOT-OS-ALPINE-322-CVE-2026-58051","title":"CVE-2026-58051 in libssh2 - Patched by Root","description":"Root has patched CVE-2026-58051 in the libssh2 package for Root:Alpine:3.22. Multiple fixed versions available.","status":"withdrawn","published":"2026-09-29T09:39:27Z","modified":"2026-10-22T13:00:07.893562013Z","updated_at":"2026-11-02T15:53:28.544053Z"},{"id":"ROOT-OS-ALPINE-323-CVE-2026-58051","title":"CVE-2026-58051 in libssh2 - Patched by Root","description":"Root has patched CVE-2026-58051 in the libssh2 package for Root:Alpine:3.23. Multiple fixed versions available.","status":"withdrawn","published":"2026-09-29T09:29:39Z","modified":"2026-10-22T13:00:08.905908805Z","updated_at":"2026-11-02T15:53:28.544053Z"},{"id":"ROOT-OS-DEBIAN-12-CVE-2026-58051","title":"CVE-2026-58051 in libssh2 - Patched by Root","description":"Root has patched CVE-2026-58051 in the libssh2 package for Root:Debian:12. Multiple fixed versions available.","status":"withdrawn","published":"2026-08-25T11:14:15Z","modified":"2026-09-07T08:00:08.184438267Z","updated_at":"2026-11-02T15:53:32.570806Z"},{"id":"ROOT-OS-DEBIAN-13-CVE-2026-58051","title":"CVE-2026-58051 in libssh2 - Patched by Root","description":"Root has patched CVE-2026-58051 in the libssh2 package for Root:Debian:13. Multiple fixed versions available.","status":"withdrawn","published":"2026-08-24T16:07:06Z","modified":"2026-10-09T13:00:17.279104874Z","updated_at":"2026-11-02T15:53:33.681527Z"},{"id":"SUSE-SU-2026:23049-1","title":"Security update for libssh2_org","description":"This update for libssh2_org fixes the following issues:\n\n- CVE-2025-15661: out-of-bounds heap read vulnerability in the `sftp_symlink()` function in `src/sftp.c` (bsc#1268546).\n- CVE-2026-7598: integer overflow in function `userauth_password` of file `src/userauth.c` (bsc#1263890).\n- CVE-2026-58050: heap buffer overflow due to missing bounds check in attribute count of publickey-subsystem response\n  (bsc#1269568).\n- CVE-2026-58051: uninitialized pointer freed when malformed responses are sent by an SSH server (bsc#1269567).\n- CVE-2026-66032: arbitrary code execution via double-free in SFTP session (bsc#1272737).\n- CVE-2026-66033: denial of service via integer underflow in AES-GCM cipher negotiation (bsc#1272736).\n- CVE-2026-66034: information disclosure and potential arbitrary code execution via heap out-of-bounds read\n  (bsc#1272735).\n- CVE-2026-66035: arbitrary code execution via heap buffer overflow during SSH negotiation (bsc#1272734).\n","status":"published","published":"2026-08-10T15:24:14Z","modified":"2026-08-12T10:45:03.527208296Z","updated_at":"2026-11-02T15:54:03.503431Z"},{"id":"SUSE-SU-2026:23187-1","title":"Security update for libssh2_org","description":"This update for libssh2_org fixes the following issues:\n\n- CVE-2025-15661: out-of-bounds heap read vulnerability in the `sftp_symlink()` function in `src/sftp.c` (bsc#1268546).\n- CVE-2026-7598: integer overflow in function `userauth_password` of file `src/userauth.c` (bsc#1263890).\n- CVE-2026-55199: pre-authentication DoS via the `SSH_MSG_EXT_INFO` handler (bsc#1268530).\n- CVE-2026-58050: heap buffer overflow due to missing bounds check in attribute count of publickey-subsystem response\n  (bsc#1269568).\n- CVE-2026-58051: uninitialized pointer freed when malformed responses are sent by an SSH server (bsc#1269567).\n- CVE-2026-66032: arbitrary code execution via double-free in SFTP session (bsc#1272737).\n- CVE-2026-66033: denial of service via integer underflow in AES-GCM cipher negotiation (bsc#1272736).\n- CVE-2026-66034: information disclosure and potential arbitrary code execution via heap out-of-bounds read\n  (bsc#1272735).\n- CVE-2026-66035: arbitrary code execution via heap buffer overflow during SSH negotiation (bsc#1272734).\n","status":"published","published":"2026-08-17T16:37:24Z","modified":"2026-08-26T18:23:31.171326675Z","updated_at":"2026-11-02T15:54:03.503431Z"},{"id":"SUSE-SU-2026:23214-1","title":"Security update for libssh2_org","description":"This update for libssh2_org fixes the following issues:\n\n- CVE-2025-15661: out-of-bounds heap read vulnerability in the `sftp_symlink()` function in `src/sftp.c` (bsc#1268546).\n- CVE-2026-7598: integer overflow in function `userauth_password` of file `src/userauth.c` (bsc#1263890).\n- CVE-2026-58050: heap buffer overflow due to missing bounds check in attribute count of publickey-subsystem response\n  (bsc#1269568).\n- CVE-2026-58051: uninitialized pointer freed when malformed responses are sent by an SSH server (bsc#1269567).\n- CVE-2026-66032: arbitrary code execution via double-free in SFTP session (bsc#1272737).\n- CVE-2026-66033: denial of service via integer underflow in AES-GCM cipher negotiation (bsc#1272736).\n- CVE-2026-66034: information disclosure and potential arbitrary code execution via heap out-of-bounds read\n  (bsc#1272735).\n- CVE-2026-66035: arbitrary code execution via heap buffer overflow during SSH negotiation (bsc#1272734).\n","status":"published","published":"2026-08-10T15:24:14Z","modified":"2026-08-27T18:23:09.163427698Z","updated_at":"2026-11-02T15:54:03.503431Z"},{"id":"SUSE-SU-2026:23225-1","title":"Security update for libssh2_org","description":"This update for libssh2_org fixes the following issues:\n\n- CVE-2025-15661: out-of-bounds heap read vulnerability in the `sftp_symlink()` function in `src/sftp.c` (bsc#1268546).\n- CVE-2026-7598: integer overflow in function `userauth_password` of file `src/userauth.c` (bsc#1263890).\n- CVE-2026-58050: heap buffer overflow due to missing bounds check in attribute count of publickey-subsystem response\n  (bsc#1269568).\n- CVE-2026-58051: uninitialized pointer freed when malformed responses are sent by an SSH server (bsc#1269567).\n- CVE-2026-66032: arbitrary code execution via double-free in SFTP session (bsc#1272737).\n- CVE-2026-66033: denial of service via integer underflow in AES-GCM cipher negotiation (bsc#1272736).\n- CVE-2026-66034: information disclosure and potential arbitrary code execution via heap out-of-bounds read\n  (bsc#1272735).\n- CVE-2026-66035: arbitrary code execution via heap buffer overflow during SSH negotiation (bsc#1272734).\n","status":"published","published":"2026-08-10T15:24:14Z","modified":"2026-08-27T18:23:10.117559844Z","updated_at":"2026-11-02T15:54:03.503431Z"},{"id":"SUSE-SU-2026:23245-1","title":"Security update for libssh2_org","description":"This update for libssh2_org fixes the following issues:\n\nSecurity issues fixed:\n\n- CVE-2025-15661: out-of-bounds heap read vulnerability in the `sftp_symlink()` function in `src/sftp.c` (bsc#1268546).\n- CVE-2026-7598: integer overflow in function `userauth_password` of file `src/userauth.c` (bsc#1263890).\n- CVE-2026-58050: heap buffer overflow due to missing bounds check in attribute count of publickey-subsystem response\n  (bsc#1269568).\n- CVE-2026-58051: uninitialized pointer freed when malformed responses are sent by an SSH server (bsc#1269567).\n- CVE-2026-66032: arbitrary code execution via double-free in SFTP session (bsc#1272737).\n- CVE-2026-66033: denial of service via integer underflow in AES-GCM cipher negotiation (bsc#1272736).\n- CVE-2026-66034: information disclosure and potential arbitrary code execution via heap out-of-bounds read\n  (bsc#1272735).\n- CVE-2026-66035: arbitrary code execution via heap buffer overflow during SSH negotiation (bsc#1272734).\n\nOther updates and bugfixes:\n\n- Fix an issue with Encrypt-then-MAC family (bsc#1221622).\n  * Test the ETM feature in the remote end's configuration when receiving data. Upstream issue: #1331.\n- Always add the KEX pseudo-methods `ext-info-c` and `kex-strict-c-v00@openssh.com` when configuring custom method list\n  (bsc#1218971).\n  * The strict-kex extension is announced in the list of available KEX methods. However, when the default KEX method\n    list is modified or replaced, the extension is not added back automatically.\n","status":"published","published":"2026-08-19T10:47:36Z","modified":"2026-08-27T18:23:11.283934635Z","updated_at":"2026-11-02T15:54:03.503431Z"},{"id":"SUSE-SU-2026:3525-1","title":"Security update for libssh2_org","description":"This update for libssh2_org fixes the following issues:\n\n- CVE-2025-15661: out-of-bounds heap read vulnerability in the `sftp_symlink()` function in `src/sftp.c` (bsc#1268546).\n- CVE-2026-7598: integer overflow in function `userauth_password` of file `src/userauth.c` (bsc#1263890).\n- CVE-2026-55199: pre-authentication DoS via the `SSH_MSG_EXT_INFO` handler (bsc#1268530).\n- CVE-2026-58050: heap buffer overflow due to missing bounds check in attribute count of publickey-subsystem response\n  (bsc#1269568).\n- CVE-2026-58051: uninitialized pointer freed when malformed responses are sent by an SSH server (bsc#1269567).\n- CVE-2026-66032: arbitrary code execution via double-free in SFTP session (bsc#1272737).\n- CVE-2026-66033: denial of service via integer underflow in AES-GCM cipher negotiation (bsc#1272736).\n- CVE-2026-66034: information disclosure and potential arbitrary code execution via heap out-of-bounds read\n  (bsc#1272735).\n- CVE-2026-66035: arbitrary code execution via heap buffer overflow during SSH negotiation (bsc#1272734).\n","status":"published","published":"2026-08-07T13:08:26Z","modified":"2026-08-08T09:00:06.084070296Z","updated_at":"2026-11-02T15:54:04.987808Z"},{"id":"SUSE-SU-2026:3526-1","title":"Security update for libssh2_org","description":"This update for libssh2_org fixes the following issues:\n\n- CVE-2025-15661: out-of-bounds heap read vulnerability in the `sftp_symlink()` function in `src/sftp.c` (bsc#1268546).\n- CVE-2026-7598: integer overflow in function `userauth_password` of file `src/userauth.c` (bsc#1263890).\n- CVE-2026-58050: heap buffer overflow due to missing bounds check in attribute count of publickey-subsystem response\n  (bsc#1269568).\n- CVE-2026-58051: uninitialized pointer freed when malformed responses are sent by an SSH server (bsc#1269567).\n- CVE-2026-66032: arbitrary code execution via double-free in SFTP session (bsc#1272737).\n- CVE-2026-66033: denial of service via integer underflow in AES-GCM cipher negotiation (bsc#1272736).\n- CVE-2026-66034: information disclosure and potential arbitrary code execution via heap out-of-bounds read\n  (bsc#1272735).\n- CVE-2026-66035: arbitrary code execution via heap buffer overflow during SSH negotiation (bsc#1272734).\n","status":"published","published":"2026-08-07T13:09:52Z","modified":"2026-08-08T09:00:06.060355593Z","updated_at":"2026-11-02T15:54:04.987808Z"},{"id":"SUSE-SU-2026:3541-1","title":"Security update for libssh2_org","description":"This update for libssh2_org fixes the following issues:\n\n- CVE-2025-15661: out-of-bounds heap read vulnerability in the `sftp_symlink()` function in `src/sftp.c` (bsc#1268546).\n- CVE-2026-7598: integer overflow in function `userauth_password` of file `src/userauth.c` (bsc#1263890).\n- CVE-2026-58050: heap buffer overflow due to missing bounds check in attribute count of publickey-subsystem response\n  (bsc#1269568).\n- CVE-2026-58051: uninitialized pointer freed when malformed responses are sent by an SSH server (bsc#1269567).\n- CVE-2026-66032: arbitrary code execution via double-free in SFTP session (bsc#1272737).\n- CVE-2026-66033: denial of service via integer underflow in AES-GCM cipher negotiation (bsc#1272736).\n- CVE-2026-66034: information disclosure and potential arbitrary code execution via heap out-of-bounds read\n  (bsc#1272735).\n- CVE-2026-66035: arbitrary code execution via heap buffer overflow during SSH negotiation (bsc#1272734).\n","status":"published","published":"2026-08-10T12:50:14Z","modified":"2026-08-11T09:15:07.240632328Z","updated_at":"2026-11-02T15:54:05.392906Z"},{"id":"SUSE-SU-2026:4095-1","title":"Security update for libssh2_org","description":"This update for libssh2_org fixes the following issues:\n\n- CVE-2025-15661: out-of-bounds heap read vulnerability in the sftp_symlink() function in src/sftp.c (bsc#1268546).\n- CVE-2026-7598: integer overflow in function `userauth_password` of file `src/userauth.c` (bsc#1263890).\n- CVE-2026-58050: attacker controlled attribute count from a publickey-subsystem response is used without bounds\n  checking and can cause to a heap buffer overflow in a connecting libssh2 client (bsc#1269568).\n- CVE-2026-58051: public key list is increased and does not zero-initialized new entries, which can cause an\n  uninitialized pointer to be freed when a malformed response is sent by an SSH server (bsc#1269567).\n- CVE-2026-66032: Arbitrary code execution via double-free in SFTP session (bsc#1272737).\n- CVE-2026-66033: Denial of Service via integer underflow in AES-GCM cipher negotiation (bsc#1272736).\n- CVE-2026-66034: Information disclosure and potential arbitrary code execution via heap out-of-bounds read\n  (bsc#1272735).\n- CVE-2026-66035: Arbitrary code execution via heap buffer overflow during SSH negotiation (bsc#1272734).\n","status":"published","published":"2026-09-09T08:34:01Z","modified":"2026-09-14T18:23:15.58672002Z","updated_at":"2026-11-02T15:54:05.392906Z"},{"id":"USN-8532-1","title":"libssh2 vulnerabilities","description":"It was discovered that libssh2 incorrectly handled certain publickey\nsubsystem attributes. A remote attacker controlling a malicious SSH server\ncould use this issue to cause a denial of service or possibly execute\narbitrary code. (CVE-2026-58050)\n\nIt was discovered that libssh2 did not properly initialize publickey list\nentries before parsing. A remote attacker controlling a malicious SSH\nserver could use this issue to cause a denial of service or possibly\nexecute arbitrary code. (CVE-2026-58051)","status":"published","published":"2026-07-13T12:46:47Z","modified":"2026-07-13T20:44:41.330794548Z","updated_at":"2026-11-02T16:58:25.103481Z"},{"id":"USN-8799-1","title":"libssh2 vulnerabilities","description":"It was discovered that libssh2 incorrectly handled certain publickey\nsubsystem attributes. A remote attacker controlling a malicious SSH server\ncould use this issue to cause a denial of service or possibly execute\narbitrary code.\n(CVE-2026-58050)\n\nIt was discovered that libssh2 did not properly initialize publickey list\nentries before parsing. A remote attacker controlling a malicious SSH\nserver could use this issue to cause a denial of service or possibly\nexecute arbitrary code. (CVE-2026-58051)\n\nIt was discovered that libssh2 incorrectly handled certain SFTP server\nresponses. A remote attacker controlling an SSH server could use this issue\nto cause libssh2 to crash or possibly execute arbitrary code.\n(CVE-2026-66032)\n\nIt was discovered that libssh2 did not properly check bounds in certain \npublickey subsystem responses. A remote attacker controlling a malicious \nSSH server could use this issue to cause a denial of service or possibly \nexecute arbitrary code.. (CVE-2026-66034)","status":"published","published":"2026-09-22T03:58:05Z","modified":"2026-09-23T07:41:35.645588651Z","updated_at":"2026-11-02T16:58:26.907654Z"}]}}